To determine which statement correctly describes the bars on a bar graph representing the given data, let's analyze each statement one by one using the provided data:
| Sal concentration outside paramecium | Contractions per minute |
|--------------------------------------|--------------------------|
| Very high | 2 |
| High | 8 |
| Medium | 15 |
| Low | 22 |
| Very low | 30 |
1. The graph has five bars of equal height.
- To verify this statement, we should check if all the contraction values are equal.
- The given contraction values are: 2, 8, 15, 22, and 30.
- These values are clearly not equal to each other. Therefore, this statement is false.
2. The bars range from tallest for very high concentration to shortest for very low concentration.
- To verify this statement, we need to arrange the contraction values in an order from tallest to shortest.
- The given contraction values are:
- Very high: 2
- High: 8
- Medium: 15
- Low: 22
- Very low: 30
- Arranging these in order from tallest to shortest would be: 30 (very low), 22 (low), 15 (medium), 8 (high), and 2 (very high).
- This order is the opposite of what the statement says. Therefore, this statement is false.
3. The bar for very low concentration is twice the height of the bar for medium concentration.
- To verify this statement, we compare the contraction values for "very low" and "medium."
- Very low: 30
- Medium: 15
- 30 is indeed twice 15. Therefore, this statement is true.
4. The bar for very high concentration is five times the height of the bar for very low concentration.
- To verify this statement, we compare the contraction values for "very high" and "very low."
- Very high: 2
- Very low: 30
- 2 is not five times 30. Therefore, this statement is false.
Based on the analysis, the correct statements are:
- The bar for very low concentration is twice the height of the bar for medium concentration.
Therefore, the final answer is:
(True, False).
